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                        National Cyber Alert System

                 Technical Cyber Security Alert TA07-151A



Mozilla Updates for Multiple Vulnerabilities

   Original release date: May 31, 2007
   Last revised: --
   Source: US-CERT


Systems Affected

     * Mozilla Firefox
     * Mozilla Thunderbird
     * Mozilla SeaMonkey
     * Netscape Browser

   Other products based on Mozilla components may also be affected.


Overview

   The Mozilla web browser and derived products contain several
   vulnerabilities, the most severe of which could allow a remote
   attacker to execute arbitrary code on an affected system.


I. Description

   Mozilla has released new versions of Firefox, Thunderbird, and
   SeaMonkey to address several vulnerabilities. Further details about
   these vulnerabilities are available from Mozilla and the Vulnerability
   Notes Database. An attacker could exploit these vulnerabilities by
   convincing a user to view a specially-crafted HTML document, such as a
   web page or an HTML email message.

   Support for Firefox 1.5 is scheduled to end in June 2007. According to
   Mozilla:

       Firefox 1.5.0.x will be maintained with security and stability
       updates until June 2007. All users are strongly encouraged to
       upgrade to Firefox 2.


II. Impact

   While the impacts of the individual vulnerabilities vary, the most
   severe could allow a remote, unauthenticated attacker to execute
   arbitrary code on a vulnerable system. An attacker may also be able to
   cause a denial of service.


III. Solution

Upgrade

   These vulnerabilities are addressed in Mozilla Firefox 2.0.0.4,
   Firefox 1.5.0.12, Thunderbird 2.0.0.4, Thunderbird 1.5.0.12,
   SeaMonkey 1.0.9, SeaMonkey 1.1.2. By default, Mozilla Firefox,
   Thunderbird, and SeaMonkey automatically check for updates.


IV. References

     * US-CERT Vulnerability Notes -
       <http://www.kb.cert.org/vuls/byid?searchview&query=mozilla_20070531>

     * Securing Your Web Browser -
       <http://www.us-cert.gov/reading_room/securing_browser/browser_security.html#Mozilla_Firefox>

     * Mozilla Foundation Security Advisories -
       <http://www.mozilla.org/security/announce/>

     * Known Vulnerabilities in Mozilla Products -
       <http://www.mozilla.org/projects/security/known-vulnerabilities.html>

     * Mozilla Hall of Fame -
       <http://www.mozilla.org/university/HOF.html>

     * Site Controls -
       <http://browser.netscape.com/ns8/help/options-site.jsp>


 ____________________________________________________________________

   The most recent version of this document can be found at:

     <http://www.us-cert.gov/cas/techalerts/TA07-151A.html>
 ____________________________________________________________________

   Feedback can be directed to US-CERT Technical Staff. Please send
   email to <cert@cert.org> with "TA07-151A Feedback VU#751636" in the
   subject.
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   For instructions on subscribing to or unsubscribing from this
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   Produced 2007 by US-CERT, a government organization.

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     <http://www.us-cert.gov/legal.html>
 ____________________________________________________________________


Revision History

   May 31, 2007: Initial release

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